Sight-feed lubricator.



J. F. MoGANNA.

SIGHT FEED LUBRIGATOR. APPLICATION FILED APBHZO, 1912 Patented May 5;1914.

UNITED STATES PATENT clarion.

some I. anemia, or CHICAGO, ILLlIN OIS, ASSIGNOB. To mrnnmn mussMANUFAo- 'ronnw couran sr, or OHIGAGO,'ILL1INO1 IS, A CORPORATION orILLINOIS.

sIfl-nT-FEED LUBBICATOB To all whom it may 013mm.-

' Be it "known that I, JOHN FQMQCANNA,

' a citizen of the United States, and a resident of Chicago, in thecounty of Cook and State of Illinois; have invented vcertain newanduseful Improvements in Sight-FeedLuricators of which the following.is a full, clear, and exact specification.

M invention is concerned with sight-feedlubricators for oilin thebearings of engines, etc, andis deslgned to. producela s mple buteflicient construction in which a singlfe pump for each bearin to belubricated will not only pump the" oil to thebearing, but Will alsoserve tooperate a constant sight feed showin the amount of oil that isbeing pumped to the hearing. In most devices of time characterheretoforev used, two" pumps have been necessaryto efiect thisr'e suit;but with my invention a sing1s Pump,'

- in combination with a supply well and a by t same pump moves t e wellto furnish the sight feed, as wellas to sight-feed pipe leading intothe'.well from the reservoir and terminating adjacent a, transparentportion ofTthe well, serves to produce the same results as the'two; umpsheretofore. used. I In my invention; t ereie 1 the additional certaintythat the same amount of oil is being umped', to the hearing as isindicated ll e sight feed, as the oil into the supply force it from thewell to lubricate the bear 1n i to a sheet of drawings m which the samereference characters are used to designate identical parts in allthefigures'of Which,-

pum barrel'and well; while Fig. 2 Ba simi ar section through the pumpbarrel at right angles to the section shown in Fig. 1,.

reservoir must have atmospheric pressure on its upper surface, and tomsure this I pro- Speclication of Letters Patent. Applicatienflled April20, 1912. Serial No. 692,093.

g v I To illustrate my inventipn, I annex here" Figure' 1 isa verticalsection through thefor this purpose. The cover 6 is likewise preferablya casting, and has; the central cylmderor barrel 9 which is connected bythe passage 10 with the valve cylinder 11, on one side, and is similarlyconnected by the passage 12 With the well cylinder '13. The

check valve 145 which preferably takes thev form of a heavy steel ball,is located at the end of the passage 12 so as to permit ofthe 011 beingdrawn from thewell 13 into the Patented May 5,1914,

barrel 9, but so as to prevent its being forced in the opposite,direction by the piston '15 re-.

ci'procat-ing in the barrel, a wire 16 extend- 111g across the barrelabove the valve l4flpreventing possible displacement of the latter.

The valve cylinder 11 is preferably provided the twq h'eck valves 17 and18 seated there on,- wh1ch are preferably ofdiflerent sizes of steelballs, and which serve to permit of of the oil from the barrel 9 through1; e pipe the forcin I 19 to. the point of discharge but w ich preventthe possible backward movement of the oil when the piston 15 is raised.-This pipe 19 is connected withthe valve cylinder 11 by means of the plug29 screwed into the top of the cylinder and. barging a passagetherethrough, and provided at, its, llpper end "with the stufling-box21, y: which a liquid-tight connection is made between the 1pc 19 andthe plug 20. l The upper endof t e pump barrel 9 issimilarly pr ovided-,witl1 the customary stuflipg box 22throughwh1ch the piston. 15 reciprocates. A shaft 23 1s journaled in suitable bearings formed in thecasing, and" is preferably 'eci rocated by any suitable, means driven-byt e engine or machinery to be lubricated. An arm- 24 secured on theshaft 23 inside .of the reservoir 5 carries a pawl 25 .With pair ofvalve seats to accommodate,

which cod crates with the teeth of a ratchet wheel 26 o'o'sely mountedon the, shaft 23 and rigidly secured to an eccentric 27 cooperatin withthe yoke 28 secured on the lower e the cover 6 and connected by thecross head 3.0 with the piston 15. By means of the stationary abutment31 secured on, the piston 15 and the adjustable abutment or nut 32threaded thereon and having a codperating'lock nut 33, the amount oflost inotion between the rod 29 and the piston 15 can be determined toregulate therate of fecd of the oil.

' vide one or more apertures 8 in the coverv Coming now to thesight-feed mechanism,

ofthe verticall (reciprocating rod '29 extending up throng whichconstitutes the essentially novel portion of my invention, the wellcylinder 13 is provided above the ,cover 6 with a transparent portionwhich is preferably formed by using the glass cylinder 34 resting on thepacking ring 35 seated on an annular surface surrounding the top of thecylinder 13.

A similar packing ring 36 rests on the top of the glass cylinder 34:,and a cylindrical cap 37 having cut-away portions 38 has 1ts lowerendthreaded into the shallow recess into which the bottom of the glasscylin-' 1 upper end of the tube 39 iscurved, as at 40,

so that the oil passing from the reservoir into the well through thetube 39 Wlll fall,

' drop by drop, in front ofjthe transparent portion of the well, so thatan observer can note the rate at which the oil is falling.

vThe operation of my'improved apparatus will be readily apparent, aswhen the pumppist'on is reciprocated by the mechanism described, the oilwill be drawn from the bottom of the well through the passage 12 intothe barrel 9, whence it will be discharged through the passage 10 intothe pipe 19 leading to the part to be lubricated. As the oil is drawnfrom the air-tight well, the pressure of the air in the well above thelevel of the oil is reduced, and, as a consequence, the atmosphericpressure on the oil in the reservoir serves tov force-the latter upthrough the tube 39 and to deliver the oil, drop by drop, into the wellat exactly the same rate as it is pumped therefrom by the reciprocationof the piston 15, thus giving an absolute and constant indication of therateat which the oil is, being pumped.

As the oil falls from the pipe 39 into the well, it seemingly carrieswith it a small portion of the air in the well, so that in the course.of a month or so the height of the oil in the well rises to a point soas to interfere with the operationof the sight feed. To remedy this,some means must be provided for admitting air into the well sufiicientto cause the level of the oil in the well to .fall, and for this purposeI provide the screw 41 threaded into the top of the cap 37, and providedwith the packing ring 42, so that when itis screwed up tight the wellwill be airtight. When the oil in the well has risen to a point tointerfere with the'operation of'the sight feed, the screw 41 is loseneduntil the air can enter the top of the well, and they operation of thepump continues as usual, without the sight feed, however, until thecontents of the well have been lowered to the desired point, after whichthe screw 41 is tightened up and the operation of the sight feed resumelVhile I have shown and described my invention as embodied in the formwhich I at present consider best adapted to carry out pump-barrel and asupplywell cylinder,

formed therein, a valved passage connectin the bottom of the barrel andthe supplywell cylinder, a valved passage leading from the barrel to thepoint to be lubricated, a glass cylinder adapted to form a continuationof the Well above the top of the cover, a cap for the cylinder securedto the cover forming an air-tight connection between the two cylinders,a sight-feed pipe leading from the bottom of the reservoir into the welland terminating in the glass portion, a pump piston reciprocating in thebarrel, and means for reciprocating the piston.

2. In a sight-feed lubricator, the combination with a reservoir open toatmospheric pressure, of a cover therefor having a pump barrel and asupply-well cylinder formed therein, a valved passage connecting thebottom of the barrel and the supply-well cylinder, a valved passageleading from the bar rel to the point to be lubricated, a glass cylinderadapted to form a continuation ofthe well above the top of the cover, acap for the cylinder secured to the cover forming an airtight connectionbetween the two cylinders, a sight-feed pipe leading from the bottom ofthe reservoir into the well and terminating in the glass portion, a pumppiston reciprocating in the barrel, means for recip- 'roca'ting thepiston, and a screw in the top of the cap, for the purpose described. 3.In a sight-feed lubricator, the combina: tion with a reservoir open toatmospheric pressure, a cover for saidreservoir, an airtight supply-wellcarried by the cover and having a transparent portion extending abovethe same, an unobstructed sight-feed pipe leading. from" the bottom ofthe reservoir into the well and terminating adjacent the transparentportion, and capable of delivering oil up to the full capacity of thepump, a pump carried by the cover drawing its supply from the well, apassage connecting the well with the pump unobstructed as to the flowtherethrough of the ,oil from the well to the plimp and serving at all iIn witness whereof, I have hereunto set times to deliver oil to the pumpup to the my hand and aflixed my seal, this tenth day full capacity atwhich the piston is workof April, A. D. 1912.

ing, a check valve. in said last mentioned JOHN F. MOCANNA. [11. s.]passage, means for operating the pump, and Witnesses: means forregulating the rate at which the JOHN HOWARD MGELROY,

pump operates to discharge the oil. MILDRED ELsNER.

